[PATCH 3/4] drm/panel: ilitek-ili9882t: Set prepare_prev_first

[Marek Vasut]

Sending DSI commands from the prepare() callback requires DSI link to be
up at that point. For DSI hosts is guaranteed only if the panel driver
sets the .prepare_prev_first flag. Set it to let these panels work with
the DSI hosts which don't power on the link in their .mode_set callback.

Signed-off-by: Marek Vasut <marek.vasut+renesas at mailbox.org>
---
Cc: Conor Dooley <conor+dt at kernel.org>
Cc: Dave Stevenson <dave.stevenson at raspberrypi.com>
Cc: David Airlie <airlied at gmail.com>
Cc: Jessica Zhang <jesszhan0024 at gmail.com>
Cc: Krzysztof Kozlowski <krzk+dt at kernel.org>
Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Cc: Maxime Ripard <mripard at kernel.org>
Cc: Neil Armstrong <neil.armstrong at linaro.org>
Cc: Rob Herring <robh at kernel.org>
Cc: Simona Vetter <simona at ffwll.ch>
Cc: Thomas Zimmermann <tzimmermann at suse.de>
Cc: devicetree at vger.kernel.org
Cc: dri-devel at lists.freedesktop.org
Cc: linux-renesas-soc at vger.kernel.org
---
 drivers/gpu/drm/panel/panel-ilitek-ili9882t.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/panel/panel-ilitek-ili9882t.c b/drivers/gpu/drm/panel/panel-ilitek-ili9882t.c
index 219d048cb883f..24e72ad0d29a1 100644
--- a/drivers/gpu/drm/panel/panel-ilitek-ili9882t.c
+++ b/drivers/gpu/drm/panel/panel-ilitek-ili9882t.c
@@ -808,6 +808,7 @@ static int ili9882t_add(struct ili9882t *ili)
 
 	ili->base.funcs = &ili9882t_funcs;
 	ili->base.dev = &ili->dsi->dev;
+	ili->base.prepare_prev_first = true;
 
 	drm_panel_add(&ili->base);
 
-- 
2.53.0